How tyres are made

Approximately how many tires are produced globally each year?

• Around 250 million

• Around 1.5 billion

• Around 2.5 billion

• More than 7 billion

What is the initial step in tire design before any physical materials are used?

• Mixing natural and synthetic rubber

• Digitally modeling and simulating the tire

• Testing physical prototypes on a track

• Extracting latex from rubber trees

From what natural source is the milky white sap used in tire production obtained?

• Petrochemical plants

• Underground mineral deposits

• Rubber trees

• Recycled plastic materials

What percentage of a modern tire's material is typically made up of synthetic rubber?

• Less than 10%

• Around 25%

• Over 60%

• Exactly 50%

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What is the maximum allowable tolerance for the automated assembly system during the tire manufacturing process?

• 0.5 mm

• 0.01 mm

• 0.1 mm

• 1.0 mm

What is the primary outcome of the vulcanization process in tire manufacturing?

• It softens the rubber for easier molding.

• It transforms the rubber into a tough, elastic structure by reinforcing molecular bonds.

• It adds color and aesthetic patterns to the tire surface.

• It reduces the tire's overall weight for better fuel efficiency.

Which of the following is a key aspect checked during the quality control process of a newly manufactured tire?

• The tire's color consistency and shine.

• The tire's roundness, center alignment, and thickness using laser beams.

• The tire's ability to float in water.

• The tire's resistance to extreme cold temperatures.

What environmental problem is primarily caused by discarded tires due to their non-biodegradable nature and chemical composition?

• They attract large numbers of insects and pests.

• They contribute to soil erosion and desertification.

• They release toxic gases when burned and microplastics into waterways when degrading.

• They increase the global demand for new rubber production.